Analysis on Design Scheme of Main-Auxiliary Combined Indirect Dry Air Cooling Tower for 660 MW Power Plant Units

doi:10.11930/j.issn.1004-9649.201908108

Abstract

Abstract: In this paper, regarding the design scheme of the main-auxiliary combined cooling tower for 660 MW power plant units, a 3-D simulation model is built to study the impacts of ambient wind on the flow fields both inside and outside of the cooling tower. Also this paper explores how the variations of main and auxiliary circulating water temperature drop are affected by the ambient wind direction, the type of the heat exchanger of the auxiliary cooling unit and the method of increasing the number of cooling triangles. The results show that the ambient wind direction has very limited effects on the main circulating water temperature drop (about 1 ℃) but significant impacts on the auxiliary circulating water temperature drop (about 5.8 ℃). If the four-row-tube arrangement is adopted in the heat exchanger, the drop of the auxiliary circulating water temperature increases by about 0.2 ℃, and the drop of the main circulating water temperature decreases by about 0.06 ℃. The research results can provide reference for the engineering implementation of the design scheme of the main-auxiliary combined tower.

Key words: indirect cooling tower, main-auxiliary combined tower, flow field analysis, ambient wind

LI Man, HAN Jingqin, LI Lujun, ZHAO Shun’an. Analysis on Design Scheme of Main-Auxiliary Combined Indirect Dry Air Cooling Tower for 660 MW Power Plant Units[J]. Electric Power, 2020, 53(5): 155-163.

Add to citation manager EndNote|Ris|BibTeX

URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201908108

https://www.electricpower.com.cn/EN/Y2020/V53/I5/155

References

[1] 吕蒙, 杨恕非, 宁罡, 等. 350 MW空冷发电机组主辅机循环水切换的可行性研究[J]. 电站系统工程, 2017, 33(4): 58–60, 63
LV Meng, YANG Shufei, NING Gang, et al. Feasibility study of 350 MW air-cooled generator main/auxiliary machines circulating water[J]. Power System Engineering, 2017, 33(4): 58–60, 63
[2] 唐革风, 苏铭德, 符松. 横向风影响下空冷塔内外流场的数值研究[J]. 空气动力学学报, 1997, 15(3): 328–336
TANG Gefeng, SU Mingde, FU Song. Numerical study on flow field of a dry-cooling tower in a cross wind[J]. Acta Aerodynamica Sinica, 1997, 15(3): 328–336
[3] 赵振国, 石金玲, 魏庆鼎, 等. 自然风对空冷塔的不利影响及其改善措施[J]. 应用科学学报, 1998, 16(1): 112–120
ZHAO Zhenguo, SHI Jinling, WEI Qingding, et al. The engineering improvement for weakening the bad effect of natural wind on the dry cooling towers[J]. Journal of Applied Sciences, 1998, 16(1): 112–120
[4] 杨凯. 600 MW间接空冷机组空冷塔散热器冬季防冻优化[J]. 电力安全技术, 2018, 20(10): 60–62
[5] 韩中合, 张垚鹏, 李恒凡. 侧风环境下间接空冷塔百叶窗开度调节方案[J]. 汽轮机技术, 2018, 60(1): 41–44, 48
HAN Zhonghe, ZHANG Yaopeng, LI Hengfan. Adjustment scheme of louver opening degree under crosswind environment of indirect air cooling tower[J]. Turbine Technology, 2018, 60(1): 41–44, 48
[6] 王晗昀. 基于CFX的百叶窗开度对间接空冷散热器影响的研究[J]. 发电设备, 2018, 32(6): 387–393
WANG Hanyun. Influence analysis of shutter opening on the performance of an indirect air-cooling radiator based on CFX[J]. Power Equipment, 2018, 32(6): 387–393
[7] 翟英俊, 王威, 顾红方, 等. 提高核电间接空冷塔塔群散热能力的优化研究[J]. 给水排水, 2017, 43(增刊2): 72–74
[8] 赵云驰, 张荣勇. 核电厂间接空冷塔防风措施研究[J]. 给水排水, 2017, 43(增刊2): 75–79
[9] 黄俊. 改善间接空冷塔传热性能的方案与研究[J]. 电站辅机, 2017, 38(4): 22–27
HUANG Jun. The scheme and study of improving the heat transfer performance of indirect air cooling tower[J]. Power Station Auxiliary Equipment, 2017, 38(4): 22–27
[10] 王蓝婧, 刘康, 付文锋, 等. 660 MW SCAL型间接空冷塔夏季安全运行改造方案研究[J]. 动力工程学报, 2018, 38(1): 55–61, 68
WANG Lanjing, LIU Kang, FU Wenfeng, et al. Retrofit schemes for safety operation of a 660 MW SCAL indirect dry cooling tower during summer period[J]. Journal of Chinese Society of Power Engineering, 2018, 38(1): 55–61, 68
[11] 石磊, 石诚, 汤东升, 等. 间接空冷散热器及空冷钢塔流动和传热数值研究[J]. 华东电力, 2012, 40(4): 663–666
SHI Lei, SHI Cheng, TANG Dongsheng, et al. Numerical research on flow and heat transfer characteristics of air cooling steel tower with surface indirect air cooled radiator[J]. East China Electric Power, 2012, 40(4): 663–666
[12] 赵顺安, 黄春花. 间接空冷塔气体流态物理模型试验研究报告[R]. 北京: 中国水利水电科学研究院, 2011: 22-45.
[13] 黄春花, 赵顺安. 间接空冷系统塔型优化研究[J]. 中国水利水电科学研究院学报, 2011(4): 313–318
[14] 赵顺安. 排烟冷却塔的一维设计计算方法[J]. 水利学报, 2005, 36(11): 1331–1334
ZHAO Shunan. 1-D design method of natural cooling tower via which flue gas discharged[J]. Journal of Hydraulic Engineering, 2005, 36(11): 1331–1334
[15] 陈凯华, 宋存义, 李强, 等. 排烟冷却塔内流场的数值分析[J]. 电站系统工程, 2008, 24(5): 27–30
CHEN Kaihua, SONG Cunyi, LI Qiang, et al. Numerical analysis of aerodynamic field in cooling tower with flue gas injection[J]. Power System Engineering, 2008, 24(5): 27–30
[16] 张仁锋, 苏燊燊, 马继军, 等. 烟塔合一的环境影响实证研究[J]. 中国电力, 2018, 51(7): 162–169
ZHANG Renfeng, SU Shenshen, MA Jijun, et al. An empirical study on environmental impact of integration of the natural draft cooling tower and the flue gas[J]. Electric Power, 2018, 51(7): 162–169
[17] 王智, 付静, 张泽灏, 等. 600 MW三塔合一间接空冷塔塔内流场特性研究[J]. 汽轮机技术, 2019, 61(1): 37–40
WANG Zhi, FU Jing, ZHANG Zehao, et al. Heat transfer characteristics and flow field analysis of 600 MW indirect air cooled tower[J]. Turbine Technology, 2019, 61(1): 37–40
[18] 卫慧敏, 杜小泽, 杨立军, 等. 大型间接空冷塔塔形优化[J]. 热力发电, 2017, 46(11): 50–56
WEI Huimin, DU Xiaoze, YANG Lijun, et al. Configuration optimization for a large-scale dry-cooling tower[J]. Thermal Power Generation, 2017, 46(11): 50–56
[19] 邹庆江, 张义江, 郭民臣. 采用蒸发式冷却器的间接空冷系统的热经济性分析[J]. 中国电力, 2018, 51(1): 164–170
ZOU Qingjiang, ZHANG Yijiang, GUO Minchen. Thermal economic analyses of a power unit using indirect dry cooling system with an evaporative cooler[J]. Electric Power, 2018, 51(1): 164–170
[20] Fluent Inc., FLUENT 6.3 User's Guide[M]. Lebanon, NH, USA, 2006.